Bag filling machine



May 29, 1934. w. D WRIGHT BAG FILLING MACHINE 5 Sheets-Sheet 1 Filed May 5, 1932 INVENTOR Vl/i/Mzm 0/44",

7/72" 6 Mk, hi5 ATTORNEY May 29, 1934. w. D. WRIGHT BAG FILLING MACHINE Filed May 5, 1952 3 Sheets-Sheet 2 INVENTOR M ////'ar27 D Why/27 BY ha's ATTORNEY y 1934- w. D. WRIGHT 1,960,859

BAG FILLING MACHINE Filed May 5, 1952 3 Sheets-Sheet 3 INVENTOR /4 /'///a:/110 M767 44 a; 21%

id; ,4 TTORNE y 95 o o 93 0 0 o o Patented May 29, 1934 STTES BAG FILLING MACHINE Application May 5, 1932, Serial No. 609,509

9 Claims.

This invention relates to a bag filling machine of the type shown and described in an application filed by me on or about January 27, 1932, Serial No. 589,283.

The object of the present invention is to provide improved impeller construction which will adapt the bag filling machine of the aforesaid application to handle more effectively and rapidly material such as pulverized fertilizer which is liable to clog machines having impellers not especially constructed to handle such material.

With these and other objects in view the invention consists in the construction and novel combination and arrangement of parts hereinafter fully described, illustrated in the accompanying drawings and pointed out in the claims hereto appended it being understood that various changes in the form, proportion and minor details of construction within the scope of the appended claims may be resorted without departing from the spirit or sacrificing any of the advantages of the invention.

In the drawings Figure 1 is an enlarged transverse sectional View of a portion of a bag filling machine showing one form of upper and lower impellers constructed in accordance with this invention.

Fig. 2 is a plan View partly in section of the upper impeller and upper impeller casing.

Fig. 3 is a similar View showing the lower impeller. and lower impeller casing.

Fig. 4 is a transverse sectional View of a portion of a bag filling machine illustrating another construction of upper and lower impellers.

Fig. 5 is a horizontal sectional view taken substantially on the line 5-5 of Fig. 4.

Fig. 6 is a detail perspective view of one of the removable plates or sections of the blades of the lower impeller.

Fig. 7 is a detail perspective view of the metallic packing ring of the lower impeller casing.

Fig. 8 is a detail plan View of a portion of the bag filling machine illustrating the construction of the upper impeller.

Fig. 9 is a detail perspective view of the upper impeller.

Figs. 10 to 15, inclusive, are detail views illus-- trating the arrangement of the staggered lugs of the removable sections of the blades of the lower impeller.

Fig. 16 is an enlarged detail sectional view of a portion of a lower impeller showing the lugs formed integral with a fixed blade.

Fig. 17 is a detail perspective View of a portion of the impeller illustrated in Fig. 16 showing one of the blades thereof. 7

Referring particularly to Figs. 1 to 3 inclusive of the drawings, 1 and 2 designate upper and lower impeller casings arranged one above the other in concentric relation and mounted upon the upper impeller casing is a hopper 3 through which extends a vertical shaft 4. The upper and lower impeller casings and the hopper are cons "ucted substantially the same as the upper and lower impeller casings and hopper shown and described in the aforesaid application. The hopper 3 is flanged at the bottom at 5 and is detachably retained on the upper impeller casing by suitable fastening means. The upper impeller casing is provided in its top wall with an inlet opening 6 and the shaft 4 carries horizontal rotating arms 7 located at the upper face of the top wall of the upper impeller casing and operating as a scraper to assist in causing material to pass through the inlet opening 6 of the upper impeller casing.

The upper impeller casing 1, which is cylindrical, is provided with an outlet opening 8 communicating with the lower impeller casing and located diametrically opposite the inlet opening 6. The body portion of the upper impeller casing is cylindrical and is adjustable to change the position of the outlet opening 8 with respect to the upper inlet opening 9 of the lower impeller casing. This will vary the size of the passage between the upper and lower impeller casings. The cylindrical body portion of the upper impeller casingis arranged in a seat 10 in the top wall of the lower impeller casing and is adapted to be partially rotated by an operating arm 11 provided at its inner end with an attaching portion 12 secured to the cylindrical body portion of the upper impeller casing exteriorly thereof. The operating arm 11 is provided with a depending flange 13 having a thumb screw 14 for engaging a socket 15 provided in the vertical wall of the lower impeller casing for enabling the body portion of the upper impeller casing to be secured in its rotary adjustment. In practice, as explained in the aforesaid application, an arcuate'series of sockets will be provided to permit the desired adjustment of the upper impeller casing for varying the size of the passage between the upper and lower impeller casings. By adjusting the operating arm 11 the size of the passage between the upper and lower impellers may be varied so as to suit the character of the material operated on by the bag filling machine.

The upper rotary impeller 16 consists of a substantially rectangular hub and approximately radially disposed blades 17 which are set at an angle or inclination to enable them to sweep the material through the passage between the upper and lower impeller casings and to exert a downward pressure on the material. The cylindrical Wall of the upper impeller casing is interiorly inclined at 18 and extends upwardly and inwardly from the outer wall of the outlet opening 8 in the bottom of the upper impeller casing as clearly illustrated in Fig. 1 of the drawings to assist in feeding the material downward from the upper impeller casing. The upper rotary impeller 16 is clamped to the vertical shaft 4 by a screw 19 or other suitable fastening means and the shaft 4 forms the pivot on which the cylindrical body portion of the upper impeller casing turns in its rotary adjustment.

The lower impeller casing, which is cylindrical, is provided at the front with a discharge outlet 20 and the lower impeller 21 consists of a central enlargement or hub portion, a thin horizontal disk 22 and approximately radially arranged blades 23 formed integral with the disk 22 which constitutes the bottom of the lower rotary impeller. The disk 22 is of a diameter less than the diameter of the chamber or interior of the lower impeller casing to provide an intervening circumferential space 24 between the periphery of the disk 22 and the inner face of the wall of the lower impeller casing as clearly illustrated in Fig. 1 of the drawings.

The blades 23 which are spaced from the central hub portion of the lower impeller are beveled or cut away at their inner ends at 25, and their outer portions extend beyond the periphery of the disk 22 and project over the said circumferential space 24 and terminate closely adjacent to the inner face of the wall of the lower impeller casing. In the form of the invention illustrated in Figs. 1 to 3, inc1usive,'the radially arranged impeller blades 23 are integral with the disk or bottom ofthe lower impeller and the projecting outer portions of the blades are approximately rectangular in that they have straight upper and lower horizontal edges and vertical end edges. The blades 23 of the lower rotary impeller discharge or feed the material through the discharge opening 20 and the integral connecting disk cooperates with the blades to form pockets for carrying the material to the discharge outlet 20. The spacing of the blades from the central hub portion of the lower impeller provides an open space around the hub portion and this together with the projecting of the blades beyond the periphery of the disk 22 enables the material to be rapidly and continuously fed to and discharged through the opening 20 without liability of clogging the machine.

In order to reduce to a minimum the tendency of the material to adhere to the surfaces the upper and lower impeller casings are provided at theirinterior surfaces, which are exposed to the material, with linings 26 and 27 of rubber which may be secured to or coated on the said surfaces in any desired manner.

Also the upper and lower impellers 16 and 21 are provided at their surfaces which are exposed to the material with layers or coatings 28 and 29 of rubber. The rubber layer or coating of the upper impeller extends over the hub and the securing the lower impeller to the tubular shaft 30 on which the lower impeller is mounted.

The bottom of the lower impeller casing is provided with an opening 31 surrounding the tubular shaft 30 and designed to communicate with an air tight dust chamber such as is shown and described in the said application. The opening 31 which is preferably circular terminates short of the vertical walls of the lower impeller casing to leave a sufiicient portion of the bottom of the lower impeller casing to form an annular ledge 32 which extends from the wall of the casing to a point beneath the marginal portion of the disk 22 of the lower impeller and a suitable packing ring 33 of metal or other suitable material is arranged upon the said ledge 33 in an annular groove 34 in the upper face of the same. This packing ring 34 presents a smooth upper surface to the lower face of the disk of the impeller and it prevents the material from escaping from the lower impeller casing and passing out through the opening 31 in the bottom thereof.

The upper terminal portion 35 of the tubular shaft 30 is reduced and threaded to receive a nut 36 which clamps the lower rotary impeller on the tubular shaft against the shoulder formed by the reduction of the upper portion of the tubular shaft. The nut 36 is covered by the rubber layer or coating 29 of the lower impeller.

In Figs. 4 to 17, inclusive, of the drawings is illustrated the preferred form of the invention in which the upper and lower impellers are provided with blades designed particularly for handling fertilizer and other material liable to adhere to the surfaces of the upper and lower impellers and the upper and lower impeller casings and which material unless dislodged is liable to clog the bag filling machine. The upper impeller casing 61 which is mounted in a seat 62 in the upper wall of the lower impeller casing 63 supports a hopper 65 which is provided at the bottom with a flange 66 arranged upon the upper impeller casing and designed to be detachably secured to the same as explained in the said application. The shaft 67 which extends through the upper and lower impeller casings carries horizontal rotating arms 68 located at the upper face of the top walls of the upper impeller casing and operating as a scraper to assist in causing the material to pass through the inlet opening 69 of the upper impeller casing. The upper impeller casing, which is cylindrical, is provided in its bottom with an outlet opening '70 communicating with the lower impeller casing and located diametrically opposite the inlet opening 69.

' The body portion of the upper impeller casing is cylindrical and is adjustable to change the position of the outlet 70' with respect to the upper inlet opening 71 of the lower impeller casing. This will vary the size of a passage between the upper and lower impeller casings.

The upper rotary impeller '72, which is mounted on a smooth reduced portion 73 by a screw '74 or other suitable fastening means, consists of a substantially rectangular hub 75 and approximately radially arranged blades 76 which are set at an angle or inclination to enable them to sweep the material through the passage between the upper and lower impeller casings and to exert a downward pressure on the material. The cylindrical wall of the upper impeller casing is interiorly inclined at 7'7 and extends upwardly and inwardly from the outer wall of the opening in the bottom of the upper impeller casing, as clearlyillustrated in Fig. 4 of the drawings, to

the shaft 67 passes.

assist in feeding the material downwardly from the upper impeller casing. The smooth upper portion 73 of the shaft 67 forms a pivot on which the cylindrical body portion of the upper impeller casing turns in its rotary adjustment.

The blades 76 are provided at their ends with lon itudinally projecting lugs 78, 79, and 81 which are staggered vertically. The lugs 78 being located at the top of one of the blades, the lug 79 being located a short distance below the upper edge of the next succeeding blade, the lug 89 being located near the bottom of the next succeeding blade and the lug 81 being located at the lower edge of the next succeeding blade.

The lugs which are tapered have blunt or straight outer edges which are arranged closely adjacent the inner face of the vertical wall of the upper impeller casing for scraping material therefrom. By providing the staggered lugs the blades are adapted to scrape practically the entire area of the inner face of the said vertical wall of the upper impeller casing with a minimum amount of friction.

The blades 76 are also provided at their lower edges with pai s of lugs 82 which are staggered so as to operate over practically the entire surface of the bottom wall of the impeller casing over which the blades move so that any accumulation of fertilizer or other material on the bot tom or the vertical wall of the upper impeller casing will be scraped therefrom. The top, bot tom and vertical walls of the upper impeller casing are provided at their inner faces with a coating or lining 83 of rubber which assists in preventing fertilizer and other material from adhering to the said walls and which enables such material to be readily scraped from the walls by the lugs of the blades 76. The lower impeller casing, which is cylindrical, is provided at the front with a discharge outlet 8%, and the lower rotary impeller 85 consists of a horizontal disk 86, approximately tangentially arranged blades 87 and a central hub formed by enlarging the disk around the central opening 88 through which The disk 86 which constitutes the bottom of the lower rotary impeller is located sl ghtly above and in spaced relation to the bottom wall of the lower impeller casing and it terminates short of the vertical wall of the impeller casing to provide an intervening annular space 89.

The blades 87 are preferably composed of fixed sections 90 and removable sections 91 consisting of plates secured by screws 92 to the fixed sections 90 which are formed integral with thedisk per and lower edges of the plates so as to operate throughout the entire inner surface of the ver tical wall of the lower impeller casing. The outer end edges of the said lugs 93, 9t, 95, 96, 97 and 98 are beveled, as clearly illustrated in Fig. 5 of the drawings so that only a very small surface or portion of each lug is actually in close proximity or contact with the inner face of the vertical wall of the lower impeller casing. Two of the plates are provided at their lower edges with downwardly extending staggered lugs 99 and 109 for operating at different portions of the annular space 89 between the periphery of the disk 86 and the vertical wall of the lower impeller casing. The depending lugs 99 and 100 loosen or scrape material adhering to the bottom of the lower impeller casing and in order to facilitate the removal of such material from the walls of the lower impeller casing the top, bottom and vertical walls of the lower impeller casing and the walls of the discharge outlet 34 are provided with a lining or coating 101 of rubber.

The vertical wall is provided with an annular groove l().2'- forming an annular space or chamber 191 back of the rubber lining and forming with the rubber lining a hollow cushion as clearly illustrated in Fig. of the drawings. This annular space or chamber 101 will permit the rubber lining to yield and thereby assists in preventing any clogging of the lower impeller. The radially arranged blades are located at the outer portion of the disk 96 and an open space is thereby left between the inner ends of the blades and the hub portion of the lower impeller. This relieves the blades of pressure and the area of the blades is ample to produce a continuous flow of material through the discharge outlet 84.

The detachable sections of the blades 87 are adapted to be readily removed and replaced by new blades when necessary but instead of forming lugs on detachable sections, end lugs 102 and depending lugs 103 may be provided on blades 104 formed integral with the disk 105 of a lower rotary impeller as clearly illustrated in Figs. 16 and 17 of the drawings.

The bottom of the lower impeller casing is provided with an opening 106 which is designed to communicate with an air tight dust box similar to that described in the said application and in order to prevent the material from escaping from the lower impeller casing through the opening 106 into the dust box the said lower impeller casing is provided at its bottom wall with a metallic packing ring 107 seated in an annular groove 108 in the upper face of the bottom wall of the lower impeller casing and having a beveled upper portion forming a relatively sharp edge 109 which is arranged in close contact with the lower face of the disk of the lower impeller.

The packing ring 107 is beveled at its inner face, and its outer face, which is presented to the space 89, is vertical.

The shaft 67 is provided with a reduced portion 110 receiving the lower rotary impeller and threaded at the upper end to receive a nut 111 which clamps the lower impeller against the shoulder formed by reducing the shaft 67 to form the said portion 110.

What is claimed is:

l. A bag filling machine including an impeller casing having vertical walls, and an impeller op crating within the casing and comprising a horizontal disk arranged to support the material operated on by the impeller and provided with approximately radially arranged blades extending upwardly from the upper face of the disk and forming pockets therebetween to receive the material, said blades being provided at their outer ends with projecting scraping lugs arranged to scrape the material from the vertical Walls of the casing.

2. A bag filling machine including an impeller casing, and an impeller operating within the easing and provided with a plurality of approximate- 1y, radially arranged blades provided at their outer ends with projecting scraping lugs, said lugs being staggered vertically so as to operate on different areas of the Walls of the impeller casing.

3. A bag filling machine including a cylindrical impeller casing, a horizontal impeller rotating on a vertical axis and operating with the casing and comprising approximately radially arranged blades provided at their lower edges with depending scraping lugs located at different points along the blades.

l. A bag filling machine including a cylindrical impeller casing, and a rotary impeller operating Within the casing and having approximately radially arranged blades and provided with scraping lugs depending from the blades at the lower edges thereof and staggered longitudinally of the blades.

5. A bag filling machine including a cylindrical impeller casing and a rotary impeller operating Within the casing and including a disk having approximately radially arranged blades extending upwardly from the upper face of the disk and provided at their outer ends with horizontally rojecting scraping lugs and having depending scraping lugs at their lower edges.

6. A bag filling machine including a cylindrical impeller casing and a rotary impeller operating Within the casing and having approximately radially arranged blades provided at their outer ends with horizontally projecting scraping lugs staggered vertically.

7. A bag filling machine including a cylindrical impeller casing and a rotary impeller operating within the casing and having approximately radially arranged blades provided at their outer ends with horizontally projecting scraping lugs staggered vertically, said blades being also provided at their lower edges with depending lugs staggered longitudinally of the blades.

8. A bag filling machine including a cylindrical impeller casing having vertical walls and provided between its top and bottom with a discharge outlet, and a horizontal impeller operating within the casing and comprising a horizontal disk arranged to support material operated on by the impeller and provided with approximately radially arranged blades extending upwardly from the upper face of the disk and forming pockets therebetween, said blades being composed of fixed sections and detachable sections fitted against the fixed sections and provided at their outer ends With scraping lugs projecting beyond the disk and arranged to scrape the material from the vertical walls of the impeller casing.

9. A bag filling machine including a cylindrical impeller casing provided in its vertical wall with an annular groove, a rubber lining for the impeller casing extending over the said groove to form a hollow cushion, and a rotary impeller operating within the casing and having approximately vertically disposed radially arranged lades provided with scraping lugs located adjacent the said annular groove.

WILLIAM D. WRIGHT. 

